Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
2040–25K
20725–50K
7750–75K
2075–100K
6100–150K
2150K+
516 reports with mileage · 401 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
Electrical System. Review the 391 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Visibility/wiper. Review the 205 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Power Train. Review the 47 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
32 crash reports3 fire reports17 injury reports
What owners actually said
917 reports
63,000 miles · Jun 5, 2020
VisibilityVisibility/wiper
I HAVE HAD TWO BRAND NEW SUBARU OUTBACKS. MY FIRST WAS A 2015 AND MY SECOND IS A 2017 OUTBACK. MY 2015 HAD 4 BROKEN WINDSHIELDS IN LESS THAN 2 YEARS. MY 2017 HAS HAD 3 BROKEN WINDSHIELDS IN 3 YEARS. ALL TOGETHER I HAVE HAD 7 BROKEN WINDSHIELDS IN 5 YEARS. SOME HAPPEN WHEN THE CAR IS NOT IN MOTION AND SOME HAVE HAPPENED WHEN…
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I HAVE HAD TWO BRAND NEW SUBARU OUTBACKS. MY FIRST WAS A 2015 AND MY SECOND IS A 2017 OUTBACK. MY 2015 HAD 4 BROKEN WINDSHIELDS IN LESS THAN 2 YEARS. MY 2017 HAS HAD 3 BROKEN WINDSHIELDS IN 3 YEARS. ALL TOGETHER I HAVE HAD 7 BROKEN WINDSHIELDS IN 5 YEARS. SOME HAPPEN WHEN THE CAR IS NOT IN MOTION AND SOME HAVE HAPPENED WHEN THE CAR IS IN MOTION. ALL THE BREAKS BEGIN SOMEWHERE AROUND THE PERIMETER OF THE WINDSHIELD (UP TO ABOUT 3-4" FROM THE EDGE. I CAN'T TELL WHAT IS CAUSING THE CRACKS TO HAPPEN BECAUSE THERE IS EITHER NO INDICATION OF ANYTHING STRIKING THE WINDSHIELD OR THERE IS A TINY "FLICK" CRACK SOUND AS IF A SPECK OF SAND HIT THE WINDSHIELD. I HAVE REPORTED THIS PROBLEM TO YOU BEFORE WHEN I OWNED THE 2015 OUTBACK. I SEE THAT THERE ARE NOW 2 CLASS ACTION SUITS PERTAINING TO THIS. HOPE THIS CAN BE REMEDIED. *TR
NHTSA ODI #11327401
48,000 miles · Jun 4, 2020
VisibilityVisibility/wiper
WINDSHIELD CRACKED ALL THE WAY ACROSS AFTER BEING EXPOSED TO EXTREME HEAT AND COLD. *TR
NHTSA ODI #11327257
67,000 miles · Jun 3, 2020
Unknown Or OtherVisibility
THE WINDSHIELD CRACKED FOR NO APPARENT REASON. THE WINDSHIELD THE SPIDER WEB CRACKED ACROSS WINDSHIELD. *TR
NHTSA ODI #11327152
30,000 miles · May 30, 2020
Electrical System
I BELIEVE THERE IS A PARASITIC DRAW ON THE ELECTRICAL SYSTEM OF MY 2017 OUTBACK (WHICH I PURCHASED IN 2016). IT HAS DIED REPEATEDLY AND RANDOMLY SINCE I PURCHASED IT, FAILING TO START AFTER BEING PARKED FOR A FEW HOURS. MORE TIMES THAN NOT NOW, IT HAS HAPPENED WHEN I'M IN THE BACKCOUNTRY (SUCH AS 05/28/2019), SOMETIMES AWAY FRO…
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I BELIEVE THERE IS A PARASITIC DRAW ON THE ELECTRICAL SYSTEM OF MY 2017 OUTBACK (WHICH I PURCHASED IN 2016). IT HAS DIED REPEATEDLY AND RANDOMLY SINCE I PURCHASED IT, FAILING TO START AFTER BEING PARKED FOR A FEW HOURS. MORE TIMES THAN NOT NOW, IT HAS HAPPENED WHEN I'M IN THE BACKCOUNTRY (SUCH AS 05/28/2019), SOMETIMES AWAY FROM CELL SERVICE. INITIALLY, I BROUGHT IT INTO THE DEALER AND THEY WERE UNABLE TO FIND ANYTHING WRONG, SO I HAVE CONTINUED TO MONITOR IT. SOMETIMES, IT IS "JUST" A DEAD BATTERY THAT CAN BE JUMPED (LIKE 10/21/2018), BUT ON OCCASION, THE CAR WILL START MOMENTARILY BUT THEN THE ENTIRE ELECTRICAL SYSTEM WILL SHUT DOWN IMMEDIATELY (03/08/2020). SOMETIMES IT IS SO DRAINED THAT THE CAR FOB WON'T EVEN WORK. EACH TIME I TAKE IT TO THE SHOP (DEALER OR MIDAS), THEY CANNOT DIAGNOSE ANY ISSUE - "THE ALTERNATOR TESTS WELL, BUT SOMETHING IS DRAINING THE BATTERY." I HAVE EVEN PURCHASED A NEW BATTERY, WHICH WAS SUPPOSED TO LAST 5 YEARS, AND IT FAILED IN UNDER A YEAR. I KEEP MY INTERIOR LIGHTS OFF AND DO NOT HAVE ANYTHING EXTRANEOUS PLUGGED INTO THE CAR, YET THE PROBLEM PERSISTS - IT HAPPENED TWICE YESTERDAY (5/29/2020). I HAVE RECENTLY LEARNED THAT THIS IS A WELL-KNOWN ISSUE FOR OUTBACK OWNERS ON VARIOUS ONLINE FORUMS AND I HOPE THAT SUBARU IS ABLE TO DO SOMETIME TO CORRECT THIS PROBLEM - THE REASON I BOUGHT THIS VEHICLE WAS TO HAVE RELIABLE TRANSPORTATION, WHICH, UNFORTUNATELY, IT MOST CERTAINLY IS NOT. *TR
NHTSA ODI #11326586
3,000 miles · May 28, 2020
Power Train
TL* THE CONTACT OWNS A 2017 SUBARU OUTBACK. THE CONTACT STATED THAT WHILE ATTEMPTING TO ACCELERATE THE VEHICLE FORWARD AFTER OR DURING A MANEUVERING THE VEHICLE IN A SENSE WHERE THE CONTACT WOULD HAVE TO DECELERATE THE VEHICLE FIRST. THE CONTACT TOOK THE VEHICLE TO THE DEALERSHIP A TOTAL OF 2 TIMES SUBARU OF JACKSONVILLE (10800 …
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TL* THE CONTACT OWNS A 2017 SUBARU OUTBACK. THE CONTACT STATED THAT WHILE ATTEMPTING TO ACCELERATE THE VEHICLE FORWARD AFTER OR DURING A MANEUVERING THE VEHICLE IN A SENSE WHERE THE CONTACT WOULD HAVE TO DECELERATE THE VEHICLE FIRST. THE CONTACT TOOK THE VEHICLE TO THE DEALERSHIP A TOTAL OF 2 TIMES SUBARU OF JACKSONVILLE (10800 ATLANTIC BLVD, JACKSONVILLE, FL 32225, (904) 641-6455) WHO INFORMED THE CONTACT THAT THE TRANSMISSION WAS A DINO FLOW TRANSMISSION AND NEEDED TO BE OPERATED IN A CERTAIN MANNER THAT THE CONTACT MAY NOT HAVE DONE. THE CONTACT MADE THE NECESSARY ADJUSTMENTS OPERATING THE VEHICLE HOWEVER, THE FAILURE PERSISTED. THE CONTACT RETURNED THE VEHICLE TO THE DEALER WHO PROVIDED THE CONTACT A LOANER VEHICLE. THE DEALER WAS NOT ABLE TO IDENTIFY THE CAUSE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 3,000.
NHTSA ODI #11326339
60,000 miles · May 27, 2020
Visibility/wiper
CRACK IN THE FRONT WINDSHIELD AT THE TOP, PASSENGER SIDE CORNER. CRACK FOR NO REASON. *TR
NHTSA ODI #11326169
8,003 miles · May 26, 2020
Electrical System
TL* THE CONTACT OWNS A 2017 SUBARU OUTBACK. THE CONTACT STATED THE VEHICLE BATTERY DRAINED PREMATURELY. THE VEHICLE EMITTED A CLICKING SOUND AFTER THE VEHICLE WAS DRIVEN. THE VEHICLE WAS TAKEN TO ISLAND SUBARU (111 QUINTARD STREET, STATEN ISLAND NY, 10305, (718) 697-6000 ON SEVERAL OCCASIONS DUE TO THE BATTERY FAILURE. THE BATTE…
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TL* THE CONTACT OWNS A 2017 SUBARU OUTBACK. THE CONTACT STATED THE VEHICLE BATTERY DRAINED PREMATURELY. THE VEHICLE EMITTED A CLICKING SOUND AFTER THE VEHICLE WAS DRIVEN. THE VEHICLE WAS TAKEN TO ISLAND SUBARU (111 QUINTARD STREET, STATEN ISLAND NY, 10305, (718) 697-6000 ON SEVERAL OCCASIONS DUE TO THE BATTERY FAILURE. THE BATTERY WAS REPLACED BUT FAILED TO FIX THE ISSUE. THE CONTACT WAS INFORMED THAT THE VEHICLE SHOULD BE DRIVEN MORE TO ALLOW THE BATTERY TO BE RECHARGED DUE TO COMPUTERS IN THE VEHICLE CONSTANTLY RUNNING EVEN WHILE THE VEHICLE WAS PARKED AND IDLE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED AND INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS 8,003.
NHTSA ODI #11326019
30,000 miles · May 25, 2020
Electrical System
DEFECTIVE ELECTRICAL SYSTEM CAUSING BATTERY DISCHARGE AND GOING DEAD. BATTERY NEEDS REPLACED AND KEEPS GOING DEAD.
NHTSA ODI #11325910
25,000 miles · May 20, 2020
StructureVisibility
PARKED MY LEASED 2017 OUTBACK IN MY DRIVEWAY LAST NIGHT WITH NOTHING OVERHEAD, NO TREES, ETC. THIS MORNING THERE WAS A LARGE CRACK IN THE WINDSHIELD WHICH BEGAN AT THE BOTTOM OF THE GLASS ON THE PASSENGER SIDE AND CONTINUED ON FOR OVER 15 INCHES. TOTAL MYSTERY. *TR
NHTSA ODI #11325333
13,000 miles · May 18, 2020
Electrical System
I AM 1 OF MANY OWNERS WITH THE SAME ISSUE WITH THE ELECTRICAL RENDERING A DEAD BATTERY. REPLACING BATTERY AND CONSTANTLY CHARGING AT THIS POINT IS THE ONLY WAY TO GET YOUR VEHICLE TO RUN. AT THIS POINT THE BATTERY IS DEAD EVERY MORNING IN THE GARAGE. *TR
Subaru of America, Inc. (Subaru) is recalling certain 2016-2017 Outback vehicles. A replacement air bag control module may have been installed that is not compatible with the passenger air bag module, possibly affecting air bag deployment.
Consequence & remedy
Consequence: In the event of a crash necessitating passenger frontal air bag deployment, the air bag may not deploy properly, increasing the risk of injury.
Remedy: Subaru will notify owners, and dealers will replace the passenger air bag module, free of charge. The recall began February 3, 2020. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is WUX-09.
Subaru of America, Inc. (Subaru) is recalling certain model year 2017 Legacy and Outback vehicles manufactured September 21, 2016, to September 23, 2016. In the affected vehicles, the knee guard bracket may not be properly attached to the steering beam assembly.
Consequence & remedy
Consequence: If the knee guard is not properly attached and the driver is not wearing a seatbelt, the knee guard may not be able to properly restrain the driver's lower body in the event of a crash, increasing the risk of injury.
Remedy: Subaru will notify owners, and dealers will inspect the knee guard welding on each vehicle's steering beam, replacing the beam as necessary, free of charge. The recall began November 14, 2016. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WTL-72.
Additional source detail variants (2)
Air Bags:knee Bolster
Subaru of America, Inc. (Subaru) is recalling certain model year 2017 Legacy and Outback vehicles manufactured September 21, 2016, to September 23, 2016. In the affected vehicles, the knee guard bracket may not be properly attached to the steering beam assembly.
Consequence: If the knee guard is not properly attached and the driver is not wearing a seatbelt, the knee guard may not be able to properly restrain the driver's lower body in the event of a crash, increasing the risk of injury.
Remedy: Subaru will notify owners, and dealers will inspect the knee guard welding on each vehicle's steering beam, replacing the beam as necessary, free of charge. The recall began November 14, 2016. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WTL-72.
Steering:column
Subaru of America, Inc. (Subaru) is recalling certain model year 2017 Legacy and Outback vehicles manufactured September 21, 2016, to September 23, 2016. In the affected vehicles, the knee guard bracket may not be properly attached to the steering beam assembly.
Consequence: If the knee guard is not properly attached and the driver is not wearing a seatbelt, the knee guard may not be able to properly restrain the driver's lower body in the event of a crash, increasing the risk of injury.
Remedy: Subaru will notify owners, and dealers will inspect the knee guard welding on each vehicle's steering beam, replacing the beam as necessary, free of charge. The recall began November 14, 2016. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WTL-72.
Subaru of America, Inc. (Subaru) is recalling certain model year 2017 Outback vehicles manufactured June 20, 2016, to June 23, 2016. The affected vehicles may have improperly tightened attaching bolts for the front left and right brake calipers, wheel hubs, and the right stabilizer clamp.
Consequence & remedy
Consequence: If any of the front brake caliper, wheel hub or stabilizer clamp attaching bolts loosen or detach, the related components would also become loose and may detach possibly making the vehicle unstable and reducing the braking capability. These conditions would increase the risk of a crash.
Remedy: Subaru has notified owners, and dealers will inspect the bolts for proper torque, and replace any loose bolts, free of charge. The recall began on August 8, 2016. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WTE-66.
Additional source detail variants (2)
Service Brakes, Hydraulic:foundation Components:disc:caliper
Subaru of America, Inc. (Subaru) is recalling certain model year 2017 Outback vehicles manufactured June 20, 2016, to June 23, 2016. The affected vehicles may have improperly tightened attaching bolts for the front left and right brake calipers, wheel hubs, and the right stabilizer clamp.
Consequence: If any of the front brake caliper, wheel hub or stabilizer clamp attaching bolts loosen or detach, the related components would also become loose and may detach possibly making the vehicle unstable and reducing the braking capability. These conditions would increase the risk of a crash.
Remedy: Subaru has notified owners, and dealers will inspect the bolts for proper torque, and replace any loose bolts, free of charge. The recall began on August 8, 2016. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WTE-66.
Suspension
Subaru of America, Inc. (Subaru) is recalling certain model year 2017 Outback vehicles manufactured June 20, 2016, to June 23, 2016. The affected vehicles may have improperly tightened attaching bolts for the front left and right brake calipers, wheel hubs, and the right stabilizer clamp.
Consequence: If any of the front brake caliper, wheel hub or stabilizer clamp attaching bolts loosen or detach, the related components would also become loose and may detach possibly making the vehicle unstable and reducing the braking capability. These conditions would increase the risk of a crash.
Remedy: Subaru has notified owners, and dealers will inspect the bolts for proper torque, and replace any loose bolts, free of charge. The recall began on August 8, 2016. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WTE-66.
Subaru of America, Inc. (Subaru) is recalling certain model year 2016-2017 Legacy and Outback vehicles manufactured February 29, 2016, to May 6, 2016. The steering column on the affected vehicles may have been improperly machined, and as a result, turning the steering wheel may have no effect on the direction of the wheels.
Consequence & remedy
Consequence: The loss of steering ability would increase the risk of a crash.
Remedy: Subaru will notify owners, and dealers will inspect the lot number on the steering column, replacing the steering column, as necessary, free of charge. The recall began May 13, 2016. Owners may contact Subaru customer service at 1-800-782-2783 or by visiting http://www.wtd65.service-campaign.com. Subaru's number for this recall is WTD-65. Note: Until the vehicles have been inspected, owners are advised not to drive their vehicles.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
1
EA21002 · Desiccated Air Bag Inflator Rupture
Opened Sep 17, 2021 · No close date supplied
Status: open (inferred from source dates) · Air Bags:frontal:driver Side:inflator Module; Air Bags:frontal:passenger Side:inflator Module
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.
Additional source detail variants (2)
Air Bags:frontal:driver Side:inflator Module
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.
Air Bags:frontal:passenger Side:inflator Module
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.